Guru Maharaj:  Rupa Goswami, they wrote a poetry, Krishna Nama Astakam. By hearing the glories of the holy name, one can increase their attachment for the holy names. But by chanting the holy names, one can increase the attachment to the holy names. If one does not chant the holy names, how can attachment increase for the holy name. The happiness we get on chanting the holy name, naturally our attachment to the holy name increases. On the path of devotion, we have nista, asakti and ruci. First one gets nista, then one gets ruci. When there is taste or bliss in chanting then naturally one will become attached or asakti will be there.